Jetty: Essex Oyster Twill Shirt - Oxblood The Essex Twill Shirts are your new "go-to" for a night out at the bar, or cool evening cruising the back bays. The Essex Shirts are not only insanely soft, but are also highly breathable, anti-microbial, anti-static, have anti-odor properties that are unique to Oystex textiles. DETAILS: 55% Cotton 45% Oystex Recycled Polyester (180 GSM)